Half a century ago when I was reading a lot of science fiction, there was a recurring theme that space travellers would age more slowly than the inhabitants of the planets they visited. Is this actually true according to real science?
i am not talking about travel through wormholes and such - these concepts did not exist at the time, only straight forward FTL "rockets".
I think that in the SF novels space travel was always faster than light, which might mean that time was going backwards, but I am also interested in knowing how the situation would be if the space travel was happening with speeds slower than c.
I also think that we should stick to special relativity and ignore gravity, or at least calculate the case with and without general relativity.
So this is the situation: A space traveller flies away from Earth at a speed a) slower than light, or b) faster than light, and returns to Earth. Will she have aged slower than her family on Earth?
As I see it, from the perspective of the space traveller, Earth is moving away at high speed, so from her point of view it would be her family that aged slower, and when she returns to Earth there should be a mismatch between the viewpoints of her and her family. My own solution is that when she returns, she is reversing the process, so that the two clocks will again be synchronous when she steps out of the "rocket". Am I right?
i am not talking about travel through wormholes and such - these concepts did not exist at the time, only straight forward FTL "rockets".
I think that in the SF novels space travel was always faster than light, which might mean that time was going backwards, but I am also interested in knowing how the situation would be if the space travel was happening with speeds slower than c.
I also think that we should stick to special relativity and ignore gravity, or at least calculate the case with and without general relativity.
So this is the situation: A space traveller flies away from Earth at a speed a) slower than light, or b) faster than light, and returns to Earth. Will she have aged slower than her family on Earth?
As I see it, from the perspective of the space traveller, Earth is moving away at high speed, so from her point of view it would be her family that aged slower, and when she returns to Earth there should be a mismatch between the viewpoints of her and her family. My own solution is that when she returns, she is reversing the process, so that the two clocks will again be synchronous when she steps out of the "rocket". Am I right?
via JREF Forum http://ift.tt/LsvMTl
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